/* ===========================
   VARIABLES DE COLOR
=========================== */
:root {
  --color-bg: #111;
  --color-bg-hover: #222;
  --color-text: #fff;
  --color-accent: #0af;
}

/* ===========================
   RESET
=========================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: system-ui, sans-serif;
    background-color: var(--color-bg);
}

/* ===========================
   HEADER
=========================== */
.nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background: var(--color-bg);
  color: var(--color-text);
  position: relative;
}

/* LOGO */
.nav-logo {
  font-size: 1.3rem;
  font-weight: bold;
}

/* ===========================
   BOTÓN HAMBURGUESA
=========================== */
.nav-toggle {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
}

.hamburger,
.hamburger::before,
.hamburger::after {
  width: 28px;
  height: 3px;
  background: var(--color-text);
  display: block;
  transition: .3s ease;
  border-radius: 3px;
}

.hamburger::before,
.hamburger::after {
  content: "";
  position: relative;
}

.hamburger::before { top: -8px; }
.hamburger::after { top: 5px; }

/* ===========================
   MENÚ MOBILE
=========================== */
.nav-menu {
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background: var(--color-bg);
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
}

.nav-menu ul { list-style: none; }

.nav-menu li {
  border-bottom: 1px solid var(--color-bg-hover);
}

.nav-menu a {
  display: block;
  padding: 1rem;
  color: var(--color-text);
  text-decoration: none;
  transition: background .2s;
}

.nav-menu a:hover {
  background: var(--color-bg-hover);
}

/* MENÚ ABIERTO */
.nav-menu.open {
  max-height: 500px;
    z-index: 1;
}

/* ANIMACIÓN DEL BOTÓN */
.nav-toggle.active .hamburger {
  background: transparent;
}

.nav-toggle.active .hamburger::before {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active .hamburger::after {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* ===========================
   ESCRITORIO
=========================== */
@media (min-width: 768px) {
  .nav-toggle { display: none; }

  .nav-menu {
    position: static;
    max-height: none;
    width: auto;
  }

  .nav-menu ul {
    display: flex;
    gap: 1.5rem;
  }

  .nav-menu li { border: none; }

  .nav-menu a {
    padding: .5rem 0;
  }

  .nav-menu a:hover {
    background: none;
    color: var(--color-accent);
  }
}